Tag Archives: Sandvik Mining & Rock Technology

Sandvik cone crushers go circular with recycled wear parts

Sandvik Group is encouraging circularity in the mining industry through the recycling of steel from used cone crusher parts to make new crushing equipment.

While extractive industries such as mining are responsible for 50% of global carbon dioxide (CO2) emissions, recycling steel from mining equipment could make all the difference, according to Anders Åkesson, QM EHS Manager, Crushing & Screening at Sandvik Mining & Rock Technology (SMRT).

Circularity is becoming vital in the reduction of CO2 emissions, and can help improve the environmental position of many industries. With the mining industry contributing a large percentage of global CO2 emissions, implementing circularity could help it make vital reductions, Åkesson says.

To produce equipment, the mining industry predominantly uses manganese steel, which is renowned for its work-hardening properties and resistance to abrasion. This means the material becomes harder with the more impact it receives, creating a low friction surface suited to crushing. For this reason, manganese steel has been used in high impact applications for over 100 years, making it an ideal material for cone crushers.

Cone crushers are used to grind down rocks, which are fed into the top of the crusher and pressed between the mantle and the cone. This breaks the rock down into smaller fragments, which are then passed through lower levels of the crusher where they are broken down further.

“It’s vital that cone crushers are made from a material that provides the necessary force to grind the rocks, while withstanding the abrasive nature of the process,” Åkesson said.

Using recycled steel from used cone crusher parts to make new cone crushers, Sandvik SMRT has demonstrated and improved circularity of steel production for mining equipment, he explained. The division was nominated for Sandvik’s first sustainability award in April 2020, which recognises sustainable innovations from its employees.

Sourcing manganese steel from one of the world’s most sustainable manganese foundries, based in Sweden, was the first step SMRT took towards its sustainable innovation. A total of 91% circular steel was used to manufacture wear parts, such as the cone and mantle of a cone crusher. These wear parts are reused to produce new wear parts for the cone crushers – creating a continuous cycle, Åkesson said.

Moving away from a linear model, Sandvik increased the circularity and sustainability of its products and eliminated 79% of production emissions, according to Åkesson. “In addition, Sandvik cone crushers help SMRT’s customers to lower their environmental impact as they are buying from the circular economy – contributing to their own sustainability goals,” he said.

Åkesson concluded: “With mining contributing towards CO2 emissions in more ways than one, it’s essential that the industry uses methods that reduce emissions. Reusing and recycling steel to manufacture mining equipment has demonstrated an opportunity that helps meet the sustainability goals of both equipment suppliers and their customers. If the industry wants to become circular, taking a look at equipment a good place to start.”

Sandvik underlines interoperability policy for mining’s digitalisation journey

The COVID-19 pandemic means less people in the mining area, working to achieve the same output; this makes digitalisation no longer a nice-to-have but a vital efficiency mechanism for survival, according to Niel McCoy, Business Line Manager for Automation and Digitalisation at Sandvik Mining & Rock Technology.

McCoy says the challenge when it comes to applying digitalisation successfully is often getting the ‘vision’ right from the outset.

“Most mining companies have for years been working to digitalise their operations, but the difficulty is to know exactly what this process is meant to achieve and where managers want their mines to be in the future,” McCoy says. “Bringing in new technologies means fundamentally changing the way your operation runs, so you need to be ready for the change management that this will require.”

The result is many mines still struggling to develop and apply digital strategies, the company says.

Effective digitalisation, McCoy says, involves nothing less than moving away from the traditional style of management. It means bringing everything towards a more centralised point.

“Digitalisation allows the whole underground mining operation to become visual – as if the ‘roof’ has been lifted off the mine – and to be managed from an operational management centre,” he says. “This gives management a view of all operations in real time, and the ability to optimise the various processes.”

Before any digital implementation can begin, the goal must be clear in everyone’s minds – a picture of what their ‘mine of the future’ looks like, he says. This will then guide the roadmap to be followed for adoption of digital tools.

“Without an end in mind, this will become just another initiative,” McCoy says. “Operations people will be unable to contextualise what the digital solutions mean within the big picture, and how it will improve their day-to-day activities and outcomes. This is mainly due to the data not being used in day-to-day management and decision making. It can never be a ‘side project’.”

McCoy emphasises that digital solutions are not just for managers to see more clearly what is happening on their mines; it is also vital for the people on the ground to run their operations more effectively and efficiently. As a result, there needs to be full buy-in from the start if the intended efficiencies are to be realised in practice.

“The only way of making mining operations more efficient is to understand what is happening and where, and to react accordingly as quickly as possible,” he says. “One of the main shortcomings with traditional, hard copy reporting methods on mines is that it simply takes too long for managers to sort through the raw reports from each shift and identify problems in time to make a meaningful intervention.”

This means that operations can never be properly optimised, according to Sandvik. Digital tools play a valuable role in addressing this challenge, helping mines achieve their key performance indicators.

“A good example of a key performance indicator in the context of the COVID-19 pandemic is this: how do we get the best out of a reduced workforce?” he says. “Once a mine has clarified how it plans to approach this, it can start selecting the appropriate digital tools to achieve its goals.”

Niel McCoy, Business Line Manager for Automation and Digitalisation at Sandvik Mining & Rock Technology

Change management is at the heart of the process, based on short interval control and process management, according to the company, with Sandvik Mining & Rock Technology’s core focus in digitalisation being process management and optimisation, through its OptiMine® product.

There are five different modules within OptiMine that we offer customers, depending on their digital requirements,” McCoy says. “Further digital solutions are also available, relating to aspects including telemetry of non-Sandvik equipment, face utilisation, ventilation monitoring, personnel tracking and ventilation-on-demand through our Newtrax platform.”

McCoy says Sandvik’s experience in this field is substantial, demonstrated by the fact that OptiMine has been installed at about 66 sites worldwide.

He also emphasises that, while industry technology providers have their own specific focus areas, mines need to ensure the different systems integrate effectively.

“As a manager on a mine, you don’t want to have dozens of different login points and dashboards to manage your operational data,” he says. “Rather, you want just a few key interfaces from which you can gather the overview you need. That is why it is so important to have your digital vision and understand what solutions you will require to achieve this vision.”

Interoperability is, therefore, a vital aspect of this digitalisation planning – this is, again, an area Sandvik has been working on, with many of its digital solutions now able to be integrated into platforms supplied by other vendors.

“Sandvik Mining & Rock Technology’s leading interoperability policy commits the company to working with any other type of information system that a customer has on site,” it says. “This is to achieve the effective transfer of data between systems, to make it more useful for the customer.”

McCoy added: “We are very proud of this policy, and are one of the first original equipment manufacturers to make such a policy public. It shows our understanding of the bigger digital picture and our role within it – aimed at ensuring that the customer is empowered to use their data the way they choose.”

Sandvik’s Sleeve Saver to provide more uptime and improved productivity

The Sleeve Saver™ features an all-new design engineered to last longer than standard longwall picks, according to Sandvik Mining & Rock Technology.

It works to protect and extend the life of the sleeve and block through an advanced cutting tip and a full-sleeve retainer. A new washer system acts as a bearing, improving rotation and increasing wear life. This results in more uptime and better productivity, Sandvik said.

The Sleeve Saver also enhances safety, as improved wear life reduces the time miners are exposed to the longwall face to replace worn picks, sleeves and blocks. Its universal design fits grooved and ungrooved sleeves.

The product’s cap cemented carbide cutting tip is larger than standard tips, and its efficient low-energy profile design requires less energy to cut material, generating less dust and contributing to overall longer wear life.

A large, non-rotating, full-sleeve retainer protects the entire block bore, with a new washer system that acts as a sacrificial wear bearing, absorbing the wear associated with the pick’s collar that otherwise would be absorbed by the face of the sleeve. The washer also helps to keep abrasive fines from entering the sleeve.

The retainer design reduces likelihood of the drum ‘throwing’ the picks. Superior tool rotation contributes to even wear of the tip for a longer lifecycle.

Average downtime cost for block and sleeve repair is $400/min, according to Sandvik.

“The new Sleeve Saver longwall pick will not only save up to $24,000/h in downtime costs for maintenance, but because it lasts longer than a standard pick, it will reduce the amount of time miners are exposed to the unstable longwall face. Because it protects the entire block bore, it reduces the required frequency of welding on new blocks, which must be avoided in potentially gaseous underground coal environments,” the company said.

The Sleeve Saver is unlike any other longwall tool on the market, according to Sandvik, ultimately providing miners and mine owners with these benefits:

  • Increased productivity: less machine downtime for tool, sleeve and block change-outs means more uptime producing coal;
  • Increased safety: reduced dust generation and less exposure to the longwall for changeouts results in better safety;
  • Lower maintenance costs: Sleeve Saver minimises wear on the tool and the entire block bore, and;
  • Longer service life: the Sleeve Saver lasts twice as long as conventional tools in longwall applications, and provides up to 250% longer holder life, based on field and lab tests.

Sandvik’s patented carbide alloy tips mean its tools for multiple industries are the toughest there is.

“In all applications, it is the carbide tip that is the key to tool performance and wear life,” Sandvik said.